Improvement in steam-g-enerator



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sLLoYD WmeAND, or PHILADELPHIA, PENNSYLVAMA.

Letters Patent No. 96,067, dated October 19, 1869.

IMPROVEMENT IN STEAIVLGENERATOR.

The Schedule referred to in these Letters Patent and making part of thesame.

To all @cham it may concern:

Be it known that I, S. LLOYD WIEGAND, of the city and county ofPhiladelphia, have invented certain additional new and usefulImprovements in the Steam-Generators for which Letters Patent numbered67 ,621, and issued August 6, A. l). 1867, were granted to me by theUnited States of America.

The nature of my invention consists in an improved form `of tank, soarranged as to have greater steam and water capacity, and to be moreconvenient of access for inspection, cleaning, and repairs.

A provision is also made in this invention for a more freeintercommunication between the several tanks of which the generator iscomposed, so as to facilitate cleaning by blowing o', and a moreuniforlnwatersupply in all the tanks. At the same time, the cost ofproduction and labor of erection are materially diminished by-thisinvention.-

In addition tothe above advantages, this invention .embraces an improvedmode of distributing the draught of the furnace, so as to heat thesteam-generator more equally in all its parts, thus obtaining greatersteamgenerating capacity, with a diminished fuel consumption. A

The precise nature of my invention will more fully appear in thefollowing specification, and drawings thereto annexed, which I do herebydeclare to be a full, clear, and exact description and representationthereof.

The saine let-ters of reference apply to the same partsl in the severalfigures.

Figure l is a sectional elevation.

Figure 2 is a front elevation.

Figure 3 shows a vertical section of the feed-pipe, and the end of atank as connected thereto. Figure 4 shows a plan ofthe parts embraced inFigures 5 and G, respectively, show a vertical section and a plan of thecaps applied tothe lower ends of the tubes', and the supports for theinternal tubes.

A represents the steam-drum, connected with which,

by means ofthe pipes U, inserted near the centres 0f their tops, areseveral tanks,-marked B. the tanks Bare convex.

Frein the bottoms of the tanks B hang the tubes C, containing theinternal or circulating tubes D, which pass through the perforated plateF in the tank B.

' The ends of the .tanks B are not made, as heretofore, perpendicular,but are inclined, so as to ai'ord easier access to the interior when thehand-hole plates V are removed; and when several beds of generators arebuilt-close together, the screw ybolts and nuts for securing thehand-hole plates V are more easily accessible. y

The lower ends of the tubes C are closed by the caps I, in which caps Iare placed frames K, to support the inside or'circulating tubes 1).

The frames, or supports K are madeeither of wire or sheet-metal,although castings have been used for this purpose with satisfaction.Their function is to 'hold up the internal tube D concentric with thetubes C, and permit a free flow of water from the tubes I) into the capsI.

Upon one end of each tank B there is formed a nozzle, W, which lits intoan aperture, X, inthe feedpipe F, to which pipe F the several tanks aresecured by screw-bolts G, with nuts and headsyfitting in the pockets Hin the feed-pipe F.

The tanks B, thus arranged and connected, have a free and directcommunication with each other through the pipe F and the tubes U anddrum A. A uniform level of water is maintained in them when in use, andthey are rapidly emptied in blowing off through the pipe F.

The tanks B should be made of such dimensions asnot to crowd each otherwhen heated and the pipe I is cold. In this way, an ystrain on thejoints, between the pipe F and the nozzles \V of the tanks B, fromexpansion and contraction, is avoided, the elasticity of the tubes Urelieving any differences between the expansion of the steam-drun'i Aand the tanks B.

The furnace O is made directly under the caps I of the generator, and isfed by the door R,'and the fuel supplied with air from the ashpit Q,between the grates I".

Air may he heated and admitted above the grate in the same manner as ingas-consuming stoves. and furnaces now in general use.

The gaseous products of combustion pass tothe chimney through the finesL and S, iu the wall M. They do not, however, pass in a large volume,but are divided by passing through the perforations N, in the upperportion of the wall M.

The practice pursued in the erection and use of this invention has beento make several rows of perforations, those heilig largest and mostnumerous at the top, and whenever the draught was found to be excessive,to reduce it byplugging up theperforations,

beginning with those lowest down, until a satisfactory adjustment ofthedraught was obtained.

In some cases, the front wall, over the door, was made to projectinward, as at T, in iig. 1, thus form- 4ing a chamber, Y, which Ibelieve to he useful in supplying heat to the upper portions of thefront tubes.

In all other respects but those hereinbefore described, thissteam-generator and furnace are similar to the one described andpatented in patentnumbered 67,621, issued August 6, A. I). 1867.

What I cla-im as my invention, and desire to secure as such by LettersPatent, is-

1. The tank B, constructed as shown and described 2. The feed-pipe F,when enhued and connected In testimony whereof, I have signed thisspecificawith the tanks, substantially as shown and described. tion, andthe drawings therein referred to, in the presl3. The separatesupporting-pieces K for the eircuence of two subscribing witnesses;

lating tubes, in combination with the caps, as shown S. LLOYD WIEGAND.and described. Witnesses 4. The chamber Y, with the defleetor T,arranged WM. P. THOMPSON,

substantially as shown and described.

EDWARD WILLIAMS.

